DE3038457A1 - USE OF A WASTE PRODUCT FROM THE DRY SMOKE DESULFURATION FOR THE PRODUCTION OF FLASH ASH CEMENT - Google Patents

USE OF A WASTE PRODUCT FROM THE DRY SMOKE DESULFURATION FOR THE PRODUCTION OF FLASH ASH CEMENT

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Publication number
DE3038457A1
DE3038457A1 DE19803038457 DE3038457A DE3038457A1 DE 3038457 A1 DE3038457 A1 DE 3038457A1 DE 19803038457 DE19803038457 DE 19803038457 DE 3038457 A DE3038457 A DE 3038457A DE 3038457 A1 DE3038457 A1 DE 3038457A1
Authority
DE
Germany
Prior art keywords
waste product
absorber
fly ash
calcium
use according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19803038457
Other languages
German (de)
Other versions
DE3038457C2 (en
Inventor
Wolfgang Dr.-Ing. 5226 Reichshof Bloss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
L&C Steinmueller GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L&C Steinmueller GmbH filed Critical L&C Steinmueller GmbH
Priority to DE3038457A priority Critical patent/DE3038457C2/en
Priority to DK431781A priority patent/DK431781A/en
Priority to GR66171A priority patent/GR75014B/el
Priority to DD81233949A priority patent/DD201581A5/en
Priority to FR8118969A priority patent/FR2491914B1/en
Priority to LU83683A priority patent/LU83683A1/en
Priority to NL8104622A priority patent/NL8104622A/en
Priority to JP56160388A priority patent/JPS57140344A/en
Priority to GB8130535A priority patent/GB2084985B/en
Priority to AT0433781A priority patent/AT382606B/en
Priority to BE0/206208A priority patent/BE890687A/en
Priority to IT24435/81A priority patent/IT1140217B/en
Priority to US06/311,040 priority patent/US4470850A/en
Publication of DE3038457A1 publication Critical patent/DE3038457A1/en
Application granted granted Critical
Publication of DE3038457C2 publication Critical patent/DE3038457C2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
    • C04B22/145—Gypsum from the desulfuration of flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S106/00—Compositions: coating or plastic
    • Y10S106/01—Fly ash

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

L. & C. Steinmüller GmbH 527ο Gummersbach, den 9.Ιο.198ο Postfach 1949/196Ο Pa 8ol6L. & C. Steinmüller GmbH 527ο Gummersbach, 9.Ιο.198ο P.O. Box 1949 / 196Ο Pa 8ol6

Kl./Al.Kl./Al.

PatentanmeldungPatent application

"Verwendung eines Abfallproduktes aus der trockenen Rauchgasentschwefelung für die Herstellung von Flugaschezement""Use of a waste product from dry flue gas desulphurisation for the Manufacture of fly ash cement "

Die vorliegende Erfindung betrifft die Verwendung eines Abfallproduktes, das in einem trockenen Rauchgasentschwefelungsverfahren gewonnen wird, wobei das aus der Verbrennung von fossilen Brennstoffen entstandene Rauchgas, welches auch die gesamte oder einen Teil bei der Verbrennung entstandene Flugasche mitführt, in einem AbsorberThe present invention relates to the use of a waste product in a dry flue gas desulfurization process is obtained, whereby the flue gas resulting from the combustion of fossil fuels, which also carries all or part of the fly ash produced during the incineration in an absorber

mit einer kalziumhaltigen Suspension (Absorbens) in der Weise behandelt wird, daß die Feststoffe den Absorber als trockenes Endprodukt verlassen und ganz oder teilweise einem oder mehreren Entstaubern zugeführt und abgefiltert werden, mit der Zusammensetzung 1-99 Gew.-SS, vorzugsweise 2o - 95 Gew.-Si Flugasche und 1-99 Gew.-%, vorzugsweise 5 - 8o Gew.-%is treated with a calcium-containing suspension (absorbent) in such a way that the solids leave the absorber as a dry end product and completely or partially one or more dedusters are supplied and filtered off, with the composition 1-99 wt. SS, preferably 2o - 95 wt. Si fly ash and 1-99% by weight, preferably 5-8o% by weight

vorzugsweisepreferably

der Summe der Entschwefelungsprodukte, bestehend aus Kalziumsulfatdihydrat und/oder Kalziumsulfathalbhydrat und/oder Kalziumsulfat und/oder Kalziumsulfithalbhydrat, zur Herstellung von Flugaschezement.the sum of the desulphurisation products, consisting of calcium sulphate dihydrate and / or calcium sulphate hemihydrate and / or calcium sulfate and / or calcium sulfite hemihydrate, for the production of fly ash cement.

Bei der Herstellung von Zement wird Gips als Erstarrungsverzögerer zugegeben. Dieser Zusatzstoff wird bisher in Form von Naturgips oder Naturanhydrit dem Zementklinker zugemahlen.In the manufacture of cement, gypsum is used as a setting retarder admitted. This additive has so far been added to cement clinker in the form of natural gypsum or natural anhydrite ground up.

Zemente auf der Basis von Zementklinker und Flügasche sind bereits in einigen Staaten genormt und werden dort als hydraulische Bindemittel in der Bauindustrie eingesetzt (Flugaschezement). Dabei ist der Anteil der Flugasche im Zement je nach Norm begrenzt oder nicht; begrenzt.Cements based on cement clinker and wing ash are already standardized in some states and are used there as hydraulic binders in the construction industry used (fly ash cement). The proportion of Fly ash in cement limited or not depending on the standard; limited.

In der Bundesrepublik Deutschland sind derartige Zemente nicht genormt, jedoch werden zur Zeit Richtlinien mit dem Ziel einer Normung erarbeitet.Such cements are not standardized in the Federal Republic of Germany, but guidelines are currently being established developed with the aim of standardization.

Bei der Behandlung von Rauchgasen, die bei der Verbrennung von fossilen Brennstoffen entstehen, sind im Hinblick auf die Verschärfung der Bestimmungen zur Reinhaltung der Luft Maßnahmen zu treffen, die den Schwefelgehalt derartiger Rauchgase herabsetzen. Die Entschwefelung der Rauchgase kann in bekannter Weise im Rahmen einer trockenen Rauchgasentschwefelung erfolgen. Je nach Verfahrensführung, der trockenen Rauchgasentschwefelung wird ein Gemisch aus Flugasche und kalzium-. haltigen Reaktionsprodukten der Entschwefelung sowie Resten des kalziumhaltigen Absorptionsmittels gewonnen, wobei der Gehalt an kalziumsulfathältigen Reaktionsprodukten und der Gehalt an kalziumsulfithaltigen Reaktionsprodukten durch die Verfahrensführung gesteuert werden kann. Dieses Abfallprodukt kann bisher nur ürriweltbelastend deponiert werden.In the treatment of flue gases that result from the combustion of fossil fuels, with a view to the tightening of the regulations on cleanliness to take measures to reduce the sulfur content of such smoke gases. The desulfurization the flue gases can take place in a known manner as part of a dry flue gas desulfurization. Depending on the process, the dry flue gas desulphurisation becomes a mixture of fly ash and calcium. containing reaction products of desulfurization as well as Remains of the calcium-containing absorbent obtained, the content of calcium sulfate-containing reaction products and the content of calcium sulfite-containing reaction products is controlled by the process control can be. So far, this waste product can only be harmful to the environment be deposited.

Durch Versuche konnte der Nachweis erbracht werden, daß das Kalziumsulfithalbhydrat das Kalzinmsulfatdihydrat, -halbhydrat, -anhydrit in seiner Funktion als Er.starrungsregulierer ersetzen kann, indem statt der Bildung von Ettringit 3 CaO . Al2O3 . 3 CaSO4 · 3o - 32 H3O, bzw. Kalziumaluminatmonosulfathydrat 3 CaO . Al3O, . CaSO4 . 12 HO die Bildung von Kalziumaluminatmonosulfithydrat 3 CaO . Al3O3 . CaSO3.. 8 H3O erfolgt.Experiments have shown that the calcium sulfite hemihydrate can replace the calcine sulfate dihydrate, hemihydrate, anhydrite in its function as a solidification regulator by instead of forming ettringite 3 CaO. Al 2 O 3 . 3 CaSO 4 · 3o - 32 H 3 O, or calcium aluminate monosulfate hydrate 3 CaO. Al 3 O,. CaSO 4 . 12 HO the formation of calcium aluminate monosulfite hydrate 3 CaO. Al 3 O 3 . CaSO 3 .. 8 H 3 O takes place.

Die vorliegende Erfindung hat sich daher die Aufgabe gestellt, anstelle des bisher verwendeten Naturgipses oder Naturanhydrits als Erstarrungsverzögerer und der bisherThe present invention has therefore set itself the task of instead of the previously used natural gypsum or natural anhydrite as a setting retarder and the previously used

ORIGINAL INSP11OTRJ. /.ORIGINAL INSP 11 OTRJ. /.

verwendeten Flugasche als Zusatzstoff zum Zementklinker ein Abfallprodukt sowohl als Erstarrungsregulierer als auch als Zusatzstoff bei der Herstellung von Flugaschezement einzusetzen. -^used fly ash as an additive to cement clinker, a waste product both as a setting regulator and Can also be used as an additive in the production of fly ash cement. - ^

Zur Lösung dieser Aufgabe wird die Verwendung eines Abfallproduktes aus der trockenen Rauchgasentschwefelung vorgeschlagen, welches aus einem Gemisch aus Flugasche und den eigentlichen Reaktionsprodukten der trockenen Rauchgasentschwefelung besteht, und die Zusammensetzung 1 % - 99 %, vorzugsweise 2o % - 95 %, Flugasche und 1 % 99 %, vorzugsweise 5 % - 80 % der Summe der Entschwefelungsprodukte, nämlich Kalziumsulfatdihydrat und/oder -halbhydrat und/oder -anhydrit und/oder Kalziumsulfithalbhydrat, aufweist.To solve this problem, the use of a waste product from dry flue gas desulfurization is proposed, which consists of a mixture of fly ash and the actual reaction products of dry flue gas desulfurization, and the composition 1 % - 99 %, preferably 2o % - 95 %, fly ash and 1% 99 %, preferably 5 % -80% of the sum of the desulfurization products, namely calcium sulfate dihydrate and / or calcium sulfate dihydrate and / or anhydrite and / or calcium sulfite hemihydrate.

Die Vorteile, die mit der Erfindung erreicht werden, bestehen darin, daß ein bei der trockenen Rauchgasentschwefelung entstehendes Abfallprodukt kostengünstig bei der Herstellung von Flugaschezement eingesetzt werden kann. Dadurch, daß die Zusammensetzung des Abfallproduktes durch die Verfahrensweise der trockenen Rauchgasentschwefelung so gesteuert werden kann, daß es sowohl den Erstarrungsverzögerer als auch den Zementzusatzstoff in der erforderlichen Menge enthält, kann der apparative Aufwand für die Flugaschezementherstellung reduziert und die Flugaschezementherstellung kostengünstiger gestaltet werden. Auch ist durch die Verwendung eines derartigen Produktes als Erstarrungsregulierer und gleichzeitig als Zusatzstoff bei der Flugaschezementherstellung seine umweltbelastende Deponierung nicht erforderlich, wobei insbesondere hervorzuheben ist, daß umweltbelastende Salze im Abfallprodukt verbleiben. Zusätzlich reduziert sich durch die Verwendung dieses Zwangsabfallproduktes sowohl der Abbau der natürlichen Rohstofflagerstätten für Gips als auch der für kalkhaltige Rohstoffe zur Herstellung des Zementrohmehles.The advantages that are achieved with the invention are that a dry flue gas desulfurization resulting waste product can be used inexpensively in the production of fly ash cement. The fact that the composition of the waste product through the process of dry flue gas desulfurization can be controlled to include both the retarder and the cement additive in contains the required amount, the outlay on equipment for the production of fly ash cement can be reduced and make fly ash cement production cheaper. Also through the use of such a Product as a setting regulator and at the same time as an additive in the manufacture of fly ash cement its environmentally harmful landfill is not required, it should be emphasized in particular that environmentally harmful Salts remain in the waste product. In addition, the use of this compulsory waste product reduces both the mining of natural raw material deposits for gypsum and for calcareous raw materials for production of the raw cement meal.

ORIGINAL IMSPECTEDORIGINAL IMSPECTED

Claims (9)

L. & C. SteinmiSlleay GmbH·· 527CGummersbach, den 9.Ιο.198ο Postfach 1949/196Ο Pa 8ol6L. & C. SteinmiSlleay GmbH 527CGummersbach, 9.Ιο.198ο P.O. Box 1949 / 196Ο Pa 8ol6 Kl./Al.Kl./Al. PatentansprücheClaims Verwendung eines Abfallproduktes, das in einem trokkenen Rauchgasentschwefelungsverfahren gewonnen wird, wobei das aus der Verbrennung von fossilen Brennstoffen entstandene Rauchgas, welches auch die gesamte oder einen Teil bei der Verbrennung entstandenen Flugasche mitführt, in einem Absorber mit einer kalziumhaltigen Suspension (Absorbens) in der Weise behandelt wird, daß die Feststoffe den Absorber als trockenes Endprodukt verlassen und ganz oder teilweise einem oder mehreren Entstaubern zugeführt und abgefiltert werden, mit der Zusammensetzung 1-99 Gew.-%, vorzugsweise 2o - 95 Gew.-% Flugasche und 1-99 Gew.-%, vorzugsweise 5 - 8o Gew.-% Use of a waste product that is obtained in a dry flue gas desulphurization process, the flue gas resulting from the combustion of fossil fuels, which also carries all or part of the fly ash generated during combustion, in an absorber with a calcium-containing suspension (absorbent) in the manner is treated so that the solids leave the absorber as a dry end product and are wholly or partially fed to one or more dedusters and filtered off, with the composition 1-99 wt .-%, preferably 2o - 95 wt .-% fly ash and 1-99 wt %, preferably 5-80 % by weight , _ _ , , , vorzugsweise, _ _,,, preferably der Summe der Entschwefelungsprodukte, Destehena aus Kalziumsulfatdihydrat und/oder Kalziumsulfathalbhydrat und/oder Kalziumsulfat und/oder Kalziumsulf ithalbhydrat, zur Herstellung von Flugaschezement .the sum of the desulphurisation products, Destehena from calcium sulfate dihydrate and / or calcium sulfate hemihydrate and / or calcium sulfate and / or calcium sulfite hemihydrate, for the production of fly ash cement . 2. Verwendung nach Anspruch 1, dadurch gekennzeichnet, daß nur das aus dem Absorber kommende Abfallprodukt eingesetzt wird.2. Use according to claim 1, characterized in that only that from the Absorber coming waste product is used. 3. Verwendung nach Anspruch 1, dadurch gekennzeichnet, daß nur das aus einem oder mehreren Entstaubern kommende Abfallprodukt eingesetzt wird.3. Use according to claim 1, characterized in that only the one or several dust extractors coming waste product is used. 4. Verwendung nach Anspruch 1, .dadurch gekennzeichnet/ daß ein Gemisch aus dem Abfallprodukt des Absorbers und dem der Entstaubung eingesetzt wird. . 4. Use according to claim 1,. Characterized / that a mixture of the Waste product of the absorber and that of the dedusting is used. . 5. Verwendung nach Anspruch 4, dadurch g e -5. Use according to claim 4, characterized in that g e - e t, daß das Gemisch beliebige t that the mixture is arbitrary kennzeichnmark hohe Gewichtsanteile der Abfallprodukte aus dem Absorber un<^ einem oder mehreren Entstaubern enthält. ! ·contains high proportions by weight of the waste products from the absorber and one or more dedusters. ! · ORIGINAL INSPECTEDORIGINAL INSPECTED
DE3038457A 1980-10-11 1980-10-11 Use of a waste product from dry flue gas desulphurisation for the production of fly ash cement Expired DE3038457C2 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
DE3038457A DE3038457C2 (en) 1980-10-11 1980-10-11 Use of a waste product from dry flue gas desulphurisation for the production of fly ash cement
DK431781A DK431781A (en) 1980-10-11 1981-09-29 APPLICATION OF A WASTE PRODUCT FROM TWO FREQUENCY DESIRATION FOR THE MANUFACTURE OF AIR CARTRIDGES
GR66171A GR75014B (en) 1980-10-11 1981-09-30
FR8118969A FR2491914B1 (en) 1980-10-11 1981-10-08 PROCESS FOR THE USE OF A BY-PRODUCT OF DRY SULFURIZATION OF SMOKE GASES FOR THE MANUFACTURE OF FLY ASH CEMENT
LU83683A LU83683A1 (en) 1980-10-11 1981-10-08 PROCESS FOR THE USE OF A BY-PRODUCT OF DRY SULFURIZATION OF SMOKE GASES FOR THE MANUFACTURE OF FLY ASH CEMENT
DD81233949A DD201581A5 (en) 1980-10-11 1981-10-08 USE OF A WASTE PRODUCT FROM DRY SMOKE-GAS SINKING FOR THE MANUFACTURE OF FLY POCKET CEMENT
NL8104622A NL8104622A (en) 1980-10-11 1981-10-09 APPLICATION OF A WASTE PRODUCT FROM THE DRY FUEL GAS DESULFURATION FOR THE PREPARATION OF FLY GAS CEMENT.
JP56160388A JPS57140344A (en) 1980-10-11 1981-10-09 Additive for fly ash cement
GB8130535A GB2084985B (en) 1980-10-11 1981-10-09 Cement setting regulator
AT0433781A AT382606B (en) 1980-10-11 1981-10-09 USE OF A WASTE PRODUCT FROM DRY FUME DESULFURATION AS A NUMBER FOR THE PRODUCTION OF FLASH ASH CEMENT
BE0/206208A BE890687A (en) 1980-10-11 1981-10-09 PROCESS FOR THE USE OF A BY-PRODUCT FROM THE DRY DESULFURIZATION OF SMOKE GASES FOR THE MANUFACTURE OF FLY ASH CEMENT
IT24435/81A IT1140217B (en) 1980-10-11 1981-10-09 USE OF A WASTE PRODUCT OBTAINED FROM THE DESULFURATION OF DRY COMBUSTION GASES FOR THE PRODUCTION OF CEMENT WITH VOLATILE ASH
US06/311,040 US4470850A (en) 1980-10-11 1981-10-13 Process with calcium sulfite hemihydrate in a powdery byproduct from dry flue gas desulfurization for the production of fly ash cement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3038457A DE3038457C2 (en) 1980-10-11 1980-10-11 Use of a waste product from dry flue gas desulphurisation for the production of fly ash cement

Publications (2)

Publication Number Publication Date
DE3038457A1 true DE3038457A1 (en) 1982-05-06
DE3038457C2 DE3038457C2 (en) 1983-11-10

Family

ID=6114163

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3038457A Expired DE3038457C2 (en) 1980-10-11 1980-10-11 Use of a waste product from dry flue gas desulphurisation for the production of fly ash cement

Country Status (13)

Country Link
US (1) US4470850A (en)
JP (1) JPS57140344A (en)
AT (1) AT382606B (en)
BE (1) BE890687A (en)
DD (1) DD201581A5 (en)
DE (1) DE3038457C2 (en)
DK (1) DK431781A (en)
FR (1) FR2491914B1 (en)
GB (1) GB2084985B (en)
GR (1) GR75014B (en)
IT (1) IT1140217B (en)
LU (1) LU83683A1 (en)
NL (1) NL8104622A (en)

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DE3518410A1 (en) * 1985-05-22 1986-11-27 Gebr. Knauf Westdeutsche Gipswerke KG, 8715 Iphofen Compact commercial product, process for its manufacture and its use
DE3544764A1 (en) * 1985-12-18 1987-06-19 Metallgesellschaft Ag METHOD FOR REMOVING POLLUTANTS FROM EXHAUST GAS
AT384421B (en) * 1982-08-28 1987-11-10 Rhein Westfael Elect Werk Ag USE OF THE RESIDUAL SOLIDS OF THE DRY FUME DESULFURATION AS A BUILDING MATERIAL
AT384420B (en) * 1982-08-28 1987-11-10 Rhein Westfael Elect Werk Ag USE OF RESIDUE PLASTER AND DRY RESIDUE OF A WET OR DRY WORKING FLUE GAS DESULFURATION SYSTEM
AT384373B (en) * 1982-11-12 1987-11-10 Flaekt Ab METHOD FOR PURIFYING SMOKE GASES
DE3639843A1 (en) * 1985-05-22 1988-06-16 Knauf Westdeutsche Gips Construction material, process for the production thereof and use thereof
DE3639841A1 (en) * 1985-05-22 1988-06-16 Knauf Westdeutsche Gips Construction material, process for the production thereof and use thereof

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DE3821657A1 (en) * 1988-06-27 1989-12-28 Rheine Kalkwerke Gmbh METHOD FOR PRODUCING A BINDER AND ITS USE
DE3930693C1 (en) * 1989-09-14 1991-03-14 Norina Bautechnik Gmbh, 8500 Nuernberg, De
DE4120911C1 (en) * 1991-06-25 1992-11-05 Rheinische Kalksteinwerke Gmbh, 5603 Wuelfrath, De
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US5578122A (en) * 1994-02-14 1996-11-26 The University Of Texas System Methods of producing concretes containing class C fly ash that are stable in sulphate environments
US6827776B1 (en) 2001-08-24 2004-12-07 Isg Resources, Inc. Method for accelerating setting of cement and the compositions produced therefrom
US6740155B1 (en) 2001-08-24 2004-05-25 Isg Resources, Inc. Method of delaying the set time of cement and the compositions produced therefrom
JP4775045B2 (en) * 2006-03-14 2011-09-21 宇部興産株式会社 Reducing gypsum composition, method for producing the same, cement-based solidifying material, and solidifying method
US8303842B2 (en) 2007-05-31 2012-11-06 Utter Technology, Llc Method for forming products from a flue gas desulfurization by-product and products formed thereby
US9731999B2 (en) 2011-09-23 2017-08-15 Iqbal Gill Chemical admixtures for hydraulic cements
JP6385818B2 (en) * 2014-12-25 2018-09-05 デンカ株式会社 Cement additive and cement composition
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Publication number Priority date Publication date Assignee Title
AT384421B (en) * 1982-08-28 1987-11-10 Rhein Westfael Elect Werk Ag USE OF THE RESIDUAL SOLIDS OF THE DRY FUME DESULFURATION AS A BUILDING MATERIAL
AT384420B (en) * 1982-08-28 1987-11-10 Rhein Westfael Elect Werk Ag USE OF RESIDUE PLASTER AND DRY RESIDUE OF A WET OR DRY WORKING FLUE GAS DESULFURATION SYSTEM
AT384373B (en) * 1982-11-12 1987-11-10 Flaekt Ab METHOD FOR PURIFYING SMOKE GASES
DE3518410A1 (en) * 1985-05-22 1986-11-27 Gebr. Knauf Westdeutsche Gipswerke KG, 8715 Iphofen Compact commercial product, process for its manufacture and its use
DE3639843A1 (en) * 1985-05-22 1988-06-16 Knauf Westdeutsche Gips Construction material, process for the production thereof and use thereof
DE3639841A1 (en) * 1985-05-22 1988-06-16 Knauf Westdeutsche Gips Construction material, process for the production thereof and use thereof
DE3544764A1 (en) * 1985-12-18 1987-06-19 Metallgesellschaft Ag METHOD FOR REMOVING POLLUTANTS FROM EXHAUST GAS

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IT1140217B (en) 1986-09-24
NL8104622A (en) 1982-05-03
IT8124435A0 (en) 1981-10-09
FR2491914A1 (en) 1982-04-16
DE3038457C2 (en) 1983-11-10
FR2491914B1 (en) 1986-07-18
LU83683A1 (en) 1982-02-18
DK431781A (en) 1982-04-12
DD201581A5 (en) 1983-07-27
BE890687A (en) 1982-02-01
GB2084985A (en) 1982-04-21
GR75014B (en) 1984-07-12
ATA433781A (en) 1986-08-15
GB2084985B (en) 1984-03-07
JPS57140344A (en) 1982-08-30
AT382606B (en) 1987-03-25
US4470850A (en) 1984-09-11

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